<p>Valid nesting:</p>

<p><strong><a href="url">Link</a></strong></p>

<p><a href="url"><strong>Link</strong></a></p>

<p><strong><a href="url"><strong>Link</strong></a></strong></p>

<p>Invalid nesting:</p>

<p><a href="url">[Link](url)</a></p>
